
Concept explainers
(a)
Interpretation:
The structure of compound A formed from the Diels-Alder reaction between and maleic anhydride is to be deduced.
Concept introduction:
Diels-Alder reaction is a cycloaddition reaction. This reaction is a cycloaddition reaction in which a cis-diene and a dienophile react with each other in the presence of heat and a give a six-membered ring.
(b)
Interpretation:
The curved-arrow mechanism for the conversion of compound A into the is to be stated.
Concept introduction:
The dehydration reactions are the reverse of the hydration reactions. In the hydration reactions, a water molecule is added to the compound while in the dehydration reaction a water molecule is eliminated from the molecule giving rise to formation of a double bond.

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